NAICS 238220 · Plumbing, Heating, and Air-Conditioning Contractors
Plumbers in Ontario, CA
49 licensed plumbers · every license checked against the issuer's file
More cities in California
21Rancho Cucamonga, CA · (909) 257-6458
CA-CSLB 842991 · C36Plumber
License activechecked Oct 24, 2026
Rancho Cucamonga, CA · (909) 240-8018
CA-CSLB 983618 · A C36General engineering contractorPlumber
License activechecked Oct 24, 2026
Rancho Cucamonga, CA · (909) 201-1403
CA-CSLB 1111586 · C36Plumber
License activechecked Oct 24, 2026
Rancho Cucamonga, CA · (909) 717-5994
CA-CSLB 1119147 · C36Plumber
License activechecked Oct 24, 2026
Rancho Cucamonga, CA · (909) 768-3650
CA-CSLB 1091801 · C36 D34PlumberSpecialty contractor
License activechecked Oct 24, 2026
Rancho Cucamonga, CA · (909) 463-6697
CA-CSLB 990945 · B C36General contractorPlumber
License activechecked Oct 24, 2026
Rancho Cucamonga, CA · (909) 980-6283
CA-CSLB 678352 · C36Plumber
License activechecked Oct 24, 2026
Rancho Cucamonga, CA · (909) 942-1305
CA-CSLB 1025769 · B C15 +1General contractorFlooring contractorPlumber
License activechecked Oct 24, 2026
Rancho Cucamonga, CA · (909) 941-8963
CA-CSLB 833096 · C10 C20 +1ElectricianHeating and air conditioningPlumber
License activechecked Oct 24, 2026
Rancho Cucamonga, CA · (626) 513-9110
CA-CSLB 1104738 · C36Plumber
License activechecked Oct 24, 2026
Rancho Cucamonga, CA · (909) 466-4600
CA-CSLB 853493 · B C20 +1General contractorHeating and air conditioningPlumber
License activechecked Oct 24, 2026
Rancho Cucamonga, CA · (909) 957-8470
CA-CSLB 1054041 · C36Plumber
License activechecked Oct 24, 2026
Rancho Cucamonga, CA · (909) 917-4321
CA-CSLB 1102363 · C36Plumber
License activechecked Oct 24, 2026
Rancho Cucamonga, CA · (714) 272-4004
CA-CSLB 1143630 · C10 C20 +1ElectricianHeating and air conditioningPlumber
License activechecked Oct 24, 2026
Rancho Cucamonga, CA · (909) 357-9400
CA-CSLB 1101818 · C20 C36Heating and air conditioningPlumber
License activechecked Oct 24, 2026
Rancho Cucamonga, CA · (909) 357-9400
CA-CSLB 911185 · B C10 +3General contractorElectricianHeating and air conditioning+1
License activechecked Oct 24, 2026
Rancho Cucamonga, CA · (888) 988-1812
CA-CSLB 1103401 · C36Plumber
License activechecked Oct 24, 2026
Rancho Cucamonga, CA · (310) 625-9356
CA-CSLB 1051719 · C36Plumber
License activechecked Oct 24, 2026
Rancho Cucamonga, CA · (909) 982-6979
CA-CSLB 655509 · B C10 +2General contractorElectricianHeating and air conditioning+1
License activechecked Oct 24, 2026
Montclair, CA · (626) 786-4999
CA-CSLB 977502 · C36Plumber
License activechecked Oct 24, 2026